Cask



FIG. 1 is a perspective view of a cask showing our design;

FIG. 2 is an alternative perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right-side elevation view thereof;

FIG. 6 is a left-side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the figures represent portions of the cask that form no part of the claimed design. 

CLAIM The ornamental design for a cask, as shown and described herein. 